Study on Extraction and Separation of Rubidium from Cesium Raffinate by using t-BAMBP
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摘要:
采用t-BAMBP+二甲苯体系对萃铯余液进行萃取分离提铷试验研究，考察了料液碱度、萃取剂浓度、萃取相比、萃取时间等因素对萃取提铷效果的影响。结果表明：在料液碱度为0.4 mol/L，有机相中t-BAMBP体积分数为30%，萃取相比VO/VA=3 : 1，洗涤相比VO'/VA'=4 : 1，常温萃取3 min的条件下，对萃铯余液进行四级萃取四级洗涤萃取模拟试验，铷的萃取率达94.6%。采用多轮萃取可进一步提高反萃液中铷的纯度，为得到高纯度铷盐提供了技术依据。
Abstract:T-BAMBP with xylene extraction system was applied to separate rubidium from Cesium Raffinate. The influences of feed liquid alkalinity, the extractant concentration, organic-aqueous phase ratio, extraction time on extraction and separation efficiency were investigated. The results show that extraction rate of rubidium after four staged countercurrent extraction and four staged rinse was 94.6%. The optimum conditions were 30% volume fraction t-BAMBP of organic extractant, 0.4 mol/L feed liquid alkalinity, extraction phase ratio of 3 : 1, rinse phase ratio of 4 : 1, extraction time of 3 min. The purity of rubidium in strip liquor can be further improved through multistage extraction. This study was technical basis for obtaining high purity rubidium salt.
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Key words:
- rubidium /
- 4-tert-butyl-2 (α-methylbenzyl)phenol /
- cesium raffinate /
- extraction /
- stripping
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表 1 萃铯余液主要成分 /(g·L-1)
Table 1. Main content of cesium raffinate
成分 Rb+ Li+ Cs+ K+ Na+ 含量 0.41 0.43 0.006 18.99 54.41 
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表 2 铷萃余液主要成分 /(g·L-1)
Table 2. Main content of rubidium raffinate
成分 Rb+ Li+ Cs+ K+ Na+ 含量 0.0126 0.299 0.000 8 11.15 37.27
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表 3 逆流反萃试验结果 /(mg·L-1)
Table 3. Test results of rubidium counter-current extraction
成分 Rb+ Li+ Cs+ K+ Na+ 含量 570.3 0.16 11.11 29.61 144.3
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